Electric switch.



J. M. TERZICH.

ELECTRIC SWITCH.

APPLICATION FILED IIIAYzs. 1916.

Patented Aug. 28, 1917.

mvavvboz Streuung JOHN-IVI. TERZICH, OF AMADOR CITY, CALIFORIA.'

` ELECTRIC SWITCH.

Specification of Letters Patent.

Patented Aug. 22, 191'?.

Application led May 26, 1916. Serial No. 100,136.

To all whom t mag/,concern Be it known that l, JOHN M. TnRzIoH, a citizen of the United Sta-tes, residing at Amador City, in the county of Amador and State of California, have invented new and useful Improvements in Electric Switches, of which the following is a speciiication.

This invention relates to improvements in electric switches.

One of the objects of the invention is to provide a switch having a more eective means for establishing good connection between the blade and blade-mounting.

Another object is to provide a switch wherein the blade will be securely retained in the open position until manually or otherwise released.

Vith these and other objects in view the invention will be better understood from the following detailed description taken in connection with the accompanying drawings, wherein Figure 1 is a side elevation of the switch in the open position.

Fig. 2 is a side elevation of the switch in the closed position.

Fig. 3 is aperspeetive view of the switch arm and mounting.

Referring to the drawings the numeral 'i' designates a base upon which is mounted a pair of contacts 8 and 9, the former support-- ing` a pivot bolt 10, the latter bifuroated as indicated so as to engage thel wedge shaped ends 12 ci the Switch arm 13 that has its other end rotatably connected to the bolt 10.

U pon the base 7 I provide a finger 14 nor- Inaily holding the blade 13 in open position and adapted to be thrown to a position to allowl the switch blade to move to closed position upon actuation of any suitable operating device which may be arranged to operate the nger. To accomplish this result the finger 14 is pivotally mounted within the bearing l'carried by the base 7. The finger is so disposed that when in normal position it lies in alinement with the path of movement of the arm 13 but sliding movement of the finger to one side of this position will allow the arm 13 to further move the linger until engagement is had between the contacts and arm. 1t will be seen from the drawings that in the normal position the finger 14 rests in a curved portion of the arm 13 whereby accidental displacement is rendered less likely to occur.

In the form of my invention shown in Fig. 1 gravity is relied on to bring about engagement between the switch arm andthe contact, whereas in Figs. 2 and 3 I have illustrated the contact 20 so constructed as to pivotally support the switch arm 21 and at the same time to yieldably force the'same toward closing position. To accomplish this action the contact 20 is provided with resilient extremities 21 and 22 disposed on opposite sides of the switch arm and continuously bearing against a pin 23 that passes through the switch arm. By this construction the switch arm is made to snap into the contact so as to insure a good electrical connection when the finger is moved to an inoperative position while the rubbing contact of the resilient extensions 21 and 22 against the pin 23 insures good electrical connection.

lt is to be understood that while all of the several features of my improved device have special coperation with one another and together constitute a particularly e'ective mechanism Jfor the purpose in view, certain of these features may be applied in other relations, and l therefore desire to cover the combination present in the several parts of my improved apparatus whether employed in the general organization shown or elsewhere.

Having described my invention, what l claim is:

1. A switch comprising an arm, a pivot for said arm and a support for the pivot; resilient extensions of said support and projecting portions of said arm adapted to be engaged'by said extensions; Contact jaws adapted to be engaged by said arm, a-pivoted finger adapted to prevent movement of said arm toward said contact jaws in one position and to permit such movement in the other position.

2. A switch comprising an arm, a'pivot for said arm and a support for the plvot; resilient extensions of said support and projecting portions of said arm adapted to be engaged by said extensions; contact jaws adapted to be engaged by said arm, a pivoted linger adapted to prevent movement of said arm toward said -contact jaws in one position and to permit such movement in the other position, said finger in alinementl with the path of movement of said arm in the rst position and adapted to be forced lll@ by said arm to said second position upon being displaced from alinement with said arm.

y3. A switch comprising an arm, a ivot for said arm and a support for the plvot;

resilient extensions of said support and projeeting portlons of sald arm adapted to be engaged by said extensions; contact jaws adapted to be engaged by said arm, a pivoted finger adapted to prevent movement of said-arm toward saidcontact jaws in one position and to permit such .movement in 'the other position, said linger in alinement path of movement of the arm to permit the arm to move to the closed position.

V4. A switch comprising an arm, a ivot for said arm and a support for the plvot; resilient extensions of said support and prof jecting portions of said arm adapted to be engaged by said extensions, said extensions constituting a spring means for said arm, said extensions constituting an integral part of said support, and said extensions adapted for rubbing contact with said projecting portions of saidarm, whereby good electrical connection is maintained between said arm and said support. y

In testimony whereof I aiiix my signature.`

JOHN M. TERZICH. Attest:

EARL E. PARLIN, V. B. Fox. 

